Picture series lose their sitter quietly. A frame is taken in one week, another a month later, and by the third month the woman in the first frame is a stranger to the woman in the latest one. The cause is rarely the rendering; it is the record. She was described from memory at every sitting, and memory re-invents her a little each time it is asked. A card kept on file and pasted every time does not drift.
Five lines that never change
Age and build. One number, one build, stated plainly. Hair. Colour, length and the way it is worn. Face. Skin tone, features and expression. Signature. One small repeatable detail. Wardrobe register. The fabrics and cuts the series lives in. Everything else — backdrop, chair, light — belongs to the line for this sitting, beneath the card.
The habit that holds a series together
Paste the card, take the sitting, judge the result against the card, and file the scores with the set. It is unglamorous work, and it is the entire difference between a set that reads as one woman and a folder that reads as a crowd.